Crystallization Behavior of Sol-Gel Derived Materials

将对溶胶-凝胶衍生材料结晶过程中的两个重要异常现象进行研究。这些都是;在远低于通常玻璃化转变温度的温度下，观察到一些粉末和块状材料的结晶，以及某些溶胶-凝胶薄膜在超过高多孔，大表面积溶胶-凝胶材料的粉末（或块状）结晶动力学的趋势，以便阐明这些异常现象。实验研究了凝胶在体积和薄膜形式下的结晶行为与制备过程和底物类型的关系，并对结晶动力学的理论模型进行了测试。＊＊＊

9420631 Weinberg An investigation will be performed of two important anomalies regarding the crystallization of sol-gel derived materials. These are; the observed crystallization of some powders and bulk materials at temperatures well below the usual glass transition temperature, and the tendency of certain sol-gel thin films to crystallize well in excess of the powder (or bulk) crystallization kinetics of highly porous, large surface area sol gel materials in order to shed light on these anaomalies. %%% Experimental studies of the crystallization behavior of gels in bulk and film form as a function of preparation procedure and substrate type will be done and theoretical modeling of the crystallization kinetics will be tested. ***